:root {
  --dark-rgb: 36, 36, 36;
  --light-rgb: 255, 255, 255;
  --primary-rgb: 0, 160, 150;
  --primary-color: rgba(var(--primary-rgb));
  --primary-color-lv1: rgba(var(--primary-rgb, 0.1));
  --primary-color-lv2: rgba(var(--primary-rgb, 0.2));
  --primary-color-lv3: rgba(var(--primary-rgb, 0.3));
  --primary-color-lv4: rgba(var(--primary-rgb, 0.4));
  --primary-color-lv5: rgba(var(--primary-rgb, 0.5));
  --dark-color: rgba(var(--dark-rgb));
  --light-color: rgba(var(--light-rgb));

  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: var(--dark-color);
  background-color: var(--light-color);

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: var(--primary-color);
  text-decoration: inherit;
}
a:hover {
  color: var(--primary-color-lv5);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: var(--dark-color);
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: var(--primary-color-lv5);
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
}
